Cow-milker.



K. A. TERVO.

COW MILKER. APPLIOATION FILED MART/,1914.

1,1 05,468. Patented July 28,19f4.

3 SHBBTS-SHEET l.

I i e f E K. A. TERVO.

COW MILKER.

APPLICATION FILED MAR.27,1914.

1,1 05,468. Patented July 28, 1914.

3 SHEETS-SHEET 2.

K. A. TERVO.

COW MILKBR.

APPLICATION FILED MAB..27, 1914. 1,1 05,468. Patented July 28,1914.

3 8HEETB-BHBBT 3.

KARL A. .TERVCL OF WEST QUINCY, MASSLACHTJSIEIWIS.l

COW-MILKER.

Specicatlon of Letters-Petent.

Applicationiled March 27, 19111. Serial No. 827,684.

To all zc/zo/u it may concern.' n

Be it known that I, KARL A. Tnnvo, a citizen of the United States, residing at West Quincy, in the county of Norfolk and State of Massachusetts, have invented new and useful Improvements in Cow-Milliers, of which the followinfr is a specification.

This invention relates to cow milkers, and it consists in the novel features hereinafter described and claimed.

An object of the invention is to provide a milker of simple structural `arrangement3 adapted to be easily and readily applied toy the udder and teats of a cow and adapted.; to be readily operated to accomplish the. milking operation.

Vith the above object in view, the invention comprises a receptacle having curved sides against which the teats may be arranged. Crank shafts are journaled for rotating in the receptacle and are operatively connected together whereby they turn in unison. The said shafts are provided upon their cranks with soft resiliently supported members which are adapted to pass along as the shafts are rotated and which aecom.

plish the sucking operation.

`In the accompanying drawings: Figure 1 is a top plan view of the milker. Fig. 2 `is a vertical longitudinal sectional view of the same. 1T ig. 3 is a transverse sectional view of the same. Fig. 4 is an end elevationof the same with parts broken away and parts in section. Fig. 5 is a detailed view of one of the crank shafts of the milker with parts thereof disconnected and parts in section.

The milker comprises a receptacle 1 having outwardly curved opposite sides'2which` merge at their lower portions into a transversely c'urved bottom 3. The receptacle l` is closed at one end by means of a wall a which is preferably of wood and at its other end by a wall 5 which may be of sheetfmetal, or other suitable material. A nipple 6 passes through the bottom 3 of the receptacle 1 and the end of a flexible hose (not shown) may be passed over the end of the nipple. A casing 7 is located at that end of the receptacle which is provided with the wall 5 and the said casing is normally closed at its outer end by means of a detachablewall 8 preferably of wood. The wall 8 is held in position at the end of the casing by means of a bolt 9 which passes transversely through the sides of the casing and which extends along a groove provided at the upper edge wheels mesh with each other.

of the said wall 8. The wall 8 is provided at its lower edge with a pin 10 which is adapJted to lit in a perforation rovided at the ottoni of the easing 7. Bai handles 11 are plvoted at the upper edges of the side 2 of the receptacle 1 and coiled sprinvs'l2 are connected at their lower ends with the upper edge portions of lthe walls 2 of the receptacle. 1 and the said springs are arranged .in palrs which are located one in the vicinity of each end of the receptacle 1. The u per ends of the members of each pair of springs 12 are connected 'with a link 13 and a belt 14 passes through the link 13 and is adapted to be passed over the back of the animal whereby the receptacle 1 may be held up in position against the udder. A bar 15 is located at the top of the receptacle lmidway between the side walls 2 and traverses the length ofthe said receptacle. This bar is intended to divide the teats when the receptacle is applied to the udder and .furthermore will prevent the teats from being crossed while they are in the receptacle.

A bearing plate 16 is provided 1n the-wall t and a bearing plate 17 is provided in the.

wall 8. Crank shafts 18 are journaled in the bearings of the plates 16 and 17 and the cranks of said shafts are located in the receptacle 1 between the walls 1 and 5 thereof. The cranks of the shafts 18 are made in sections and the said sections are secured together by means of securing devices 19 and when the sections are separated from each other the members which are mounted upon the cranks may be readily removed therefrom as will be hereinafter described. Gear wheels 20 are mounted upon the shafts 18 vbetween the walls 5 and 8 and the said A crank handle 21 is fixed to one of the shafts 18 and may be used for turning-.the shaft. .'lfhrcugh the intermeshing gear wheels 20 as one shaft 18 is turned the other shaft 18 is turned in an opposite direction.

Sleeves 22 are loosely mounted upon the cranks of the shafts 18 and are provided at their ends with flanges 23. Cylinders 24 are mounted upon the flanges 23 and the said cylinders are of soft flexible material as for instance soft rubber. Springs are located in the cylinders 24 and approximately travers-e the length thereof. The said springs surround the cranks of the shafts 18. The sprin s 25 are formed with a succession of convo uticns which extend from end to end Patented J Illy 2851914.

of the s rings and the said convolutions surround the intermediate portions of the said crank. The convolutions of the s rings 25 are not all of the same diameter of the said convolutions snugly receive the intermediate portions of the cranks 18 whileother of the said convolutions have contact with the inner surfaces of the cylinders 24C.

The convolutions which are intermediate in diameter 'between the larger and smaller 'convolution are spaced normally both from l'the 'shafts land the inner surfaces' of the cylii'ruie'rs24e.l The cranks of the shaft 18 are sonrranged with relation to each other that 'when one crank is vertically above the axis of its 'shaft the other crank is vertically belovv'the axis of the other shaft and inasmuch c flasthe shafts 13 rotate in op osite directions the" peri hery ofthe cylin er 24 mounted fonone s aft' will be carried across the axis of thev other shaft and vice versa as the said shafts rotate. During the milking operation and as the shafts 18 are rotated the cyl-4l inders 24s' moveV from the upper `portion of lthe receptacle 1 down along the linner surfaeesof the walls 2.of the said rece tacle, but spaced from the said walls an then may move up alon .the intermediate portion of the receptac e 1 to the upper portion thereof. y y I When the milker is' applied to the cow as hereinbefore described and the shafts 18 are rotated whereby the cylinders 24 are moved as just stated, the said cylinders encounter the teatsand press the same against the inner surfaces of the outwardly curved side walls-2 of the receptacle l. The said c linders move down along the teats and orce l i `themilk from the same which passes down upon the bottom 3 and thence out of the receptacle 1 through the nipple 6. @Wing to the flexibility of the cylinders 24: and the peculiar configuration of the springs 25 the 'said cylinders 24 will bear againstl the teats with sucient, force to extract the milk but the ressure is not excessive or injurious. lFurt ermore the configuration of the springs f1 v25'is such as to press the soft material of .the cylinders 24 partially around the teats incassa y respective of the re-elativel diameter of the teats in order that the pressure may be prope'rly applied'. By removing the securing devices 19 the sections of the shafts 18 may be disconnected from eac-h other and after this has been. done the sleeves 22 may be slipped cylinders of soft material surrounding the t coiled springs.

2.' `A'milker comprisin a receptacle having curved walls, crank s afts journaled for rotation in the receptacle7 cylinders of soft pliable material surrounding the cranks of tween the cylinders and the cranks of the shafts the convolutions of the coils of said springs varying in diameter. y

3. A Inilker comprising a receptacle having curved walls, crank shafts journaled for rotation inthe receptacle, cylinders of soft pliable material mounted upon the cranks of the shafts and springs interposed between the cylinders and the cranks of the shafts the shafts and coiled springs interposed besaid springs havin a .series of convolutions,

the' springs exten ing from end to end of the cylinders, the convolutions of the springs varyin in diameter the larger -convolutions norma ly bearing a ainst the inner lSurfaces of the cylinders, t snugly `receiving the cranks of the shafts and the intermediate convolution being spaced from the cylinders and the` shafts.

In testimony in pres-ence of two witnesses.

. 1 kann a. rsavo. Witnesses: f

i Anouar WILLIAMS.,

lJorrit l?. Laanrmrrr.

whereof I aiiix my signature e smaller convolutions, 

